Formwork MCQ with answer and solution

Concept

Steel shuttering is strong and durable. It needs very little maintenance and can be reused many times over many years.

Step-by-step solution

1. Check each material for life and maintenance. 2. Timber, ply and pressed board absorb water, warp and wear out after a few uses. 3. Steel does not absorb water and keeps its shape. It can be reused for many years with little care. 4. So the answer is Steel.

Explanation

Steel formwork has a long life and can be reused a very large number of times. It needs only cleaning and oiling, so maintenance is very low. It also gives a smooth concrete surface.

Why the other options are wrong

A: Epoxy-coated ply lasts longer than normal ply but still wears out after limited reuses. B: Timber absorbs water, swells, warps and decays, so it needs frequent repair and replacement. D: Pressed board is weak against moisture and has a short life.

Shortcut

Longest life and least maintenance in formwork means steel.

Common mistake

Choosing epoxy ply because it is coated. It is still wood-based and has a shorter life than steel.